Quote:
Originally Posted by Slabber
Car is left for several days and the rear (both sides) drops right down (67cm from ground to top of wheelarch). I open the driver's door and I hear a hissing sound and the rear of the car rises to 74 cm. I start the engine and the car rises by about another 1 cm.
Despite the leak it seems that something is staying pressurised. Thanks for any help on this!
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Assuming that the D4 air suspension works in a similar fashion to the D3, then there should be an accumulator (tank). It's a pressurised tank, and the system uses this where possible, instead of constantly relying on the compressor. The D3s also had a smaller tank attached to each of the rear suspension struts.
Regarding the hissing and the car rising, it is part of the 'wake-up signal'. I know it's not relevant to your car, but check out
SSP292 in the D3 Tech Dump section, for an understanding of how the system works.
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